F42C 15/21
Using spring action
Official title: using spring action (F42C15/32 takes precedence)
F42C15/21 (Using spring action) appears on 21 US grants and 6 published applications in this corpus.
Search patents in F42C- Granted patents
- 21
- Published applications
- 6
- Assignees
- 14
- Inventors
- 46
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Switch assembly17 Jun 2025US 12,332,037 B2BAE Systems Information and Electronic Systems Integration Inc.
- Safe-and-arm device29 Apr 2025US 12,287,186 B2
- Firing mechanism for a grenade and a grenade4 Oct 2022US 11,460,280 B2Alliance Development Group Ltd
- Ejection launcher31 Mar 2020US 10,605,561 B2Fruity Chutes Inc
- Rocker arm detonator19 Dec 2017US 9,846,019 B1Rheinmetall Waffe Munition ARGES GmbH
- Safe-and-arm Device11 Jul 2024US 2024/0230298 A1St Engineering Advanced Material Engineering Pte. Ltd.
- Switch assembly11 Jan 2024US 2024/0011751 A1BAE Systems Information and Electronic Systems Integration Inc.
- Firing Mechanism for a Grenade and a Grenade16 Sep 2021US 2021/0285749 A1Alliance Development Group Ltd
- Ejection Launcher11 Jul 2019US 2019/0212094 A1Fruity Chutes Inc
- Rocker arm detonator21 Dec 2017US 2017/0363400 A1Rheinmetall Waffe Munition ARGES GmbH
Most cited
By later US patents
- System for self destruction of a carrier shell submunition by chemical attack11US 5,373,790 AGiat Industries · 1994
- Hard target fuze11US 6,389,976 B1The United States of America as represented by the Secretary of the Army · 2002
- Projectile for smooth bore weapon10US 5,189,250 AFrag, Ltd. · 1993
- MEMS fuze assembly8US 7,552,681 B1The United States of America as represented by the Secretary of the Navy · 2009
- Safe/arm explosive transfer mechanism7US 4,667,600 AThe United States of America as represented by the Secretary of the Air Force · 1987